 index |  prime |   prime sum
------------------------------
     1 |      2 |           2
     2 |      3 |           5
     4 |      7 |          17
     6 |     13 |          41
    12 |     37 |         197
    14 |     43 |         281
    60 |    281 |        7699
    64 |    311 |        8893
    96 |    503 |       22039
   100 |    541 |       24133
   102 |    557 |       25237
   108 |    593 |       28697
   114 |    619 |       32353
   122 |    673 |       37561
   124 |    683 |       38921
   130 |    733 |       43201
   132 |    743 |       44683
   146 |    839 |       55837
   152 |    881 |       61027
   158 |    929 |       66463
   162 |    953 |       70241